This is the replacement Safety Key for various Sole treadmills. Part Number 022497. Fits the Following Models Listed Below. Sole 2006 Series - F63 (563881), Spirit Esprit Motorized Treadmill - ET188 - 2010, Esprit Motorized Treadmill - ET288 - 2010, Esprit Motorized Treadmill - ET388 - 2010, Esprit Motorized Treadmill - ET488 - 2010, Esprit Motorized Treadmill - ET588 - 2010, Esprit Motorized Treadmill - ET6 - 2007-2009, Esprit Motorized Treadmill - ET8 - 2007-2009, X Series - XT185 - 2011-2012 (185810), X Series - XT285 - 2011-2012 (285810), X Series - XT385 - 2011-2012 (385810), X Series - XT485 - 2011-2012 (485810), X Series Motorized Treadmill - XT10 - 2005-2010, X Series Motorized Treadmill - XT200 - 2005-2010, X Series Motorized Treadmill - XT275 - 2005-2010, X Series Motorized Treadmill - XT285 - 2005-2010, X Series Motorized Treadmill - XT375 - 2005-2010, X Series Motorized Treadmill - XT385 - 2005-2010, X Series Motorized Treadmill - XT485 - 2005-2010, X Series Motorized Treadmill - XT675 - 2005-2010, X Series Motorized Treadmill - XT9 - 2005-2010